Finding the Fourth Proportional to 1,667.07, 2,300.54 and 921.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.07 : 2,300.54 = 921.11 : x
2. Step 2: Convert to fraction form
   1,667.07/2,300.54 = 921.11/x
3. Step 3: Cross multiply
   1,667.07x = 2,300.54 × 921.11
4. Step 4: Simplify right side
   1,667.07x = 2,119,034.29
5. Step 5: Solve for x
   x = 2,119,034.29/1,667.07
6. Step 6: Final answer
   x = 1,271.11